Lake Ilsanjo Weather Forecast

    • 51
    • 77

    Partly Sunny

    • 51
    • 80

    Mostly Cloudy

    • 51
    • 76

    Partly Sunny

    • 54
    • 80

    Mostly Cloudy

    • 54
    • 84

    Partly Sunny

    • 53
    • 81

    Mostly Sunny

Today 15 Aug North Bay Interior Valleys

Partly cloudy late in the morning then becoming sunny. Highs in the upper 60s to lower 80s. South Winds 5 to 15 Mph.

Tonight 15 Aug North Bay Interior Valleys

Mostly clear in the evening then becoming mostly cloudy. Patchy fog. Lows in the 40s to upper 50s. Southwest Winds 5 to 15 Mph.

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Lake Ilsanjo Temperature Statistics

August Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (11.2 miles)

  • Lowest 10 August, 2026

    49.6 °F

  • Average August

    69.1 °F

  • Highest 1 August, 2026

    98.7 °F

Climate (2021–2026)

Santa Rosa, Santa Rosa Sonoma County Airport (11.2 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    72.8 °F
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